Selectivity of Partial Oxidation Reactions and Reactors

施密特氧化反应很难管理，因为在大多数情况下，它们表现出表面反应、传质、传热和均相反应之间复杂的相互作用。这些因素在整个反应器的温度变化、流动模式、多个稳态和反应选择性方面产生了复杂的实验行为。据估计，所有工业催化过程中有一半是氧化反应，在实验室条件下难以表征。如果通过降低压力和温度来获得速率和选择性，而不受传热传质和均相反应的干扰，那么结果可能与常压工业反应器无关。主要研究人员计划一个实验和建模程序，以表征催化氧化反应和反应器的情况，这将有助于设计通过部分氧化进行化学合成和通过完全氧化减少污染的新配置。他们将考虑设计新颖的反应器几何形状，以操纵流动模式和停留时间，以调整传热、传质和接触，以达到对所需产品的最大选择性。各种类型的催化单体和流化床将被用来实现非常高的质量和传热率，以及在绝热反应器中非常短的停留时间，以便中间体的产量可以最大化。反应堆将绝热运行，以使反应热决定反应堆温度，并更接近地模拟工业反应堆。分级单体也将被检查，以确定如何系统变化的反应器与位置可以用来控制性能。催化剂的几何形状、流动条件和温度会发生改变，从而使这些性质发生很大的变化。摘要-施密特氧化反应很难管理，因为在大多数情况下，它们表现出复杂的相互作用 + !!!D + + (Times New Roman Symbol & Arial " h E E E R / Maria K. Burka Maria K. Burka

Abstract - Schmidt Oxidation reactions are difficult to manage because in most situations they exhibit a complex interplay between surface reactions, mass transfer, heat transfer, and homogeneous reaction. These factors produce complicated experimental behavior in terms of temperature variations across the reactor, flow patterns, multiple steady states, and reaction selectivity. It has been estimated that one-half of all industrial catalytic processes are oxidation reaction which are difficult to characterize under laboratory conditions. If this is done by lowering pressures and temperatures to obtain rates and selectivities without interference from heat and mass transfer and homogeneous reaction, then the results may have little relevance to an atmospheric pressure industrial reactor. The principal investigators plan an experimental and modeling program to characterize catalytic oxidation reactions and reactors in situations which would be useful in designing new configurations for chemical synthesis by partial oxidation and for pollution abatement by total oxidation. They will consider novel reactor geometries designed to manipulate flow patterns and residence times to adjust heat and mass transfer and contacting in order to attain maximum selectivity to a desired product. Various types of catalytic monoliths and also fluidized beds will be used to achieve very high mass and heat transfer rates and very short residence times in adiabatic reactors so that the yields of intermediates can be maximized. Reactors will be operated adiabatically to allow reaction heat to determine reactor temperature and to si mulate industrial reactors more closely. Staged monoliths will also be examined to determine how systematic variations in reactor with position can be used to control performance. Catalyst geometries, flow conditions, and temperatures will be altered such that wide variations in these properties can be attained. n 7 ÕSPL152FTMP n 7 ÕSPL1671TMP n 7 Abstract - Schmidt Oxidation reactions are difficult to manage because in most situations they exhibit a complex interplay b + + ! ! ! D + + ( Times New Roman Symbol & Arial " h E E E R / Maria K. Burka Maria K. Burka